公开(公告)号：US11799161B2

公开(公告)日：2023-10-24

申请号：US17818407

申请日：2022-08-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Quanguo Li ,  Qian Liu ,  Yonghuang Ye ,  Fajun Huang ,  Haizu Jin

IPC: H01M50/209 ,  H01M50/267

CPC classification number: H01M50/209 ,  H01M50/267

Abstract: The present application provides a battery pack and a power consuming device powered by the battery pack. The battery pack includes a battery pack cavity and a plurality of battery cells received in the battery pack cavity. An interior space of the battery pack cavity can be divided into a first region with a temperature change rate of K1 and a second region with a temperature change rate of K2, where 0.066≤K1≤0.131 and 0.034≤K2≤0.066, K1 and K2 being expressed in ° C./min. The plurality of battery cells include at least one first battery cell arranged in the first region, and at least one second battery cell arranged in the second region. The battery pack of the present application can reduce or avoid the cask effect at low temperature and improve the energy retention rate at low temperature.

公开(公告)号：US20230163296A1

公开(公告)日：2023-05-25

申请号：US18149672

申请日：2023-01-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Quanguo Li ,  Yonghuang Ye ,  Chengdu Liang ,  Haizu Jin ,  Qian Liu ,  Fajun Huang ,  Xiaofu Xu

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/054

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/054

Abstract: A battery module, a battery pack, and an electric apparatus are provided. In some embodiments, the battery module includes a first type of cell and a second type of cell that are cells of different chemical systems, where the first type of cell includes n first cells, the second type of cell includes m second cells, n and m each are selected from an integer greater than 1, at least one of the first cells and at least one of the second cells are electrically connected in series, and the first cell and the second cell satisfy at least the following relationships: 0.08≤ΔRB/ΔRA≤3.50, and 0.10 mΩ/100 cycles≤ΔRA≤0.40 mΩ/100 cycles, where ΔRA is a discharge resistance growth rate of the first cell, and ΔRB is a discharge resistance growth rate of the second cell; and IMPB

公开(公告)号：US11901561B2

公开(公告)日：2024-02-13

申请号：US18069067

申请日：2022-12-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Quanguo Li ,  Yonghuang Ye ,  Songjun Shi ,  Qian Liu ,  Jun Peng ,  Fajun Huang

IPC: H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  H01M4/02

CPC classification number: H01M4/628 ,  H01M4/505 ,  H01M4/525 ,  H01M4/623 ,  H01M4/625 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode sheet includes a current collector including a coating region and a non-coating region, a resistance layer disposed on the current collector and including a conductive agent, a first binder, and a first positive electrode active material, and a positive electrode active material layer including a second positive electrode active material, a conductive agent, and a second binder. A resistance of the resistance layer is greater than a resistance of the positive electrode active material layer. In a cross section of the positive electrode sheet, a projection of at least a part of the positive electrode active material layer on the current collector and a projection of the resistance layer on the current collector do not overlap. A polarization parameter P of the positive electrode sheet is in a range of 0.4-65.0 and equals ((1−S)/S)·(R1/R2).

公开(公告)号：US11901555B2

公开(公告)日：2024-02-13

申请号：US18149672

申请日：2023-01-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Quanguo Li ,  Yonghuang Ye ,  Chengdu Liang ,  Haizu Jin ,  Qian Liu ,  Fajun Huang ,  Xiaofu Xu

IPC: H01M4/525 ,  H01M10/615 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/654 ,  H01M50/204 ,  H01M50/233 ,  H01M50/267 ,  H01M10/617

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/615 ,  H01M10/617 ,  H01M10/654 ,  H01M50/204 ,  H01M50/233 ,  H01M50/267

Abstract: A battery module, a battery pack, and an electric apparatus are provided. In some embodiments, the battery module includes a first type of cell and a second type of cell that are cells of different chemical systems, where the first type of cell includes n first cells, the second type of cell includes m second cells, n and m each are selected from an integer greater than 1, at least one of the first cells and at least one of the second cells are electrically connected in series, and the first cell and the second cell satisfy at least the following relationships: 0.08≤ΔRB/ΔRA≤3.50, and 0.10 mΩ/100 cycles≤ΔRA≤0.40 mΩ/100 cycles, where ΔRA is a discharge resistance growth rate of the first cell, and ΔRB is a discharge resistance growth rate of the second cell; and IMPB